/* New File */
.newfile div {
  background-color:white;
  top:15px;
  right:20px;
  bottom:15px;
  left:20px;
}

.newfile div:before,
.newfile div:after {
  content:"";
  width:0px;
  height:0px;
  border:5px solid transparent;
  border-color:black;
  top:0px;
  right:0px;
}

.newfile div:after {
  border-width:4px;
  border-color:transparent transparent white white;
}